Space Odyssey

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Across
  1. 2. A region in space where gravity is so strong that light cannot escape
  2. 4. The path followed by a planet around a star
  3. 6. A glowing ball of gas that produces its own light and heat
  4. 7. A huge system of billions of stars held together by gravity
  5. 8. A powerful explosion marking the death of a massive star
  6. 10. The theory that explains how the universe began
Down
  1. 1. A group of stars forming a pattern in the sky
  2. 3. Everything that exists: space, time, matter, and energy
  3. 5. An instrument used to observe distant objects in space
  4. 9. A cloud of gas and dust where stars are formed